40 in Words – How to Spell 40
40 = Forty
40 is written “forty” in English.
Step by step
- Split 40 into groups of three digits: 40.
- Write each group as hundreds, tens and ones, hyphenating 21–99.
- Join the groups: Forty.
As an ordinal (for dates, rankings and anniversaries), 40 becomes “fortieth”, abbreviated 40th.
Details
- In words
- Forty
- For a check
- Forty and 00/100 dollars
- Uppercase
- FORTY
- Digits
- 2
- Roman numerals
- XL
How it works
English numbers are read in groups of three digits — ones, thousands, millions and so on. Each group is spoken as hundreds, tens and units, compound numbers from twenty-one to ninety-nine take a hyphen, and in American usage the word “and” is saved for the decimal point. On a check, the cents follow as a fraction over 100.
Nearby values
Related conversions
Frequently asked questions
How do you spell 40?
Forty.
How do I write 40 dollars on a check?
Forty and 00/100 dollars.
Is there a hyphen in 40?
No — this number has no compound tens-and-ones part.
What is 40 in Roman numerals?
XL.